General Motors manufactures all Hummer vehicles, both past and present models
General Motors (GM) is the sole manufacturer of Hummer vehicles. The company has owned the Hummer brand since 1999, when it acquired it from AM General, the original builder. GM currently produces the Hummer H3 and the newer Hummer EV lineup, which launched in 2024. All Hummer vehicles sold in the United States come from GM factories.
The manufacturing history matters because it affects parts availability, warranty coverage, and resale value. If you own or are considering a Hummer, knowing that GM stands behind it — and that GM dealerships handle service — shapes your ownership experience differently than if the vehicle came from a smaller or defunct manufacturer.
Key Takeaways
- General Motors has owned and built Hummers since 1999, when it bought the brand from AM General.
- The original Hummer H1 was built by AM General from 1992 to 2006, and those vehicles require specialized service.
- GM currently manufactures the Hummer H3 (discontinued in 2010 but still in use) and the new Hummer EV models starting in 2024.
- All new Hummers sold today are built in GM factories and serviced through GM dealerships.
- Where a Hummer was built affects which parts fit, which mechanics can service it, and what warranty applies.
AM General and the original Hummer H1
AM General built the first Hummer, the H1, from 1992 to 2006. AM General is a defense contractor that originally manufactured the military Humvee, and the H1 was its civilian version. These vehicles were hand-assembled and extremely heavy, with a starting price well over $100,000 in the 1990s.
If you own an H1, parts and service are more complex than with newer Hummers. AM General no longer produces the H1, so replacement parts come from salvage yards, specialty suppliers, or GM (for some components). Mechanics experienced with H1s are fewer than those who work on H3s or the new EV models. Resale value for H1s remains high among collectors, but finding a may have access to technician matters more than it does for other Hummer generations.
General Motors takes over: the H2 and H3 era
GM bought the Hummer brand in 1999 and introduced the Hummer H2 in 2003. The H2 was built on a GM truck platform and manufactured at GM factories, making it easier to service and cheaper to maintain than the H1. GM discontinued the H2 in 2009.
The Hummer H3 launched in 2005 as a smaller, more fuel-efficient option. GM built the H3 at its Shreveport, Louisiana plant until 2010. Unlike the H1, H2 and H3 parts are widely available through GM dealerships and aftermarket suppliers. Service is straightforward because any GM-trained mechanic can work on them. The H3 is still common on the road, and finding parts and service remains straightforward.
The Hummer EV and current production
GM launched the Hummer EV in 2024 as an all-electric revival of the brand. The Hummer EV is built at GM's Factory Zero in Detroit, Michigan. This is a completely new vehicle with electric motors, a large battery pack, and modern technology — nothing shared with the H3 or earlier models except the name and design language.
Because the Hummer EV is brand new, parts availability is still building. Service must happen at GM dealerships or certified electric vehicle technicians, as the powertrain is fundamentally different from gas-powered Hummers. Warranty coverage is handled through GM, and the company has committed to supporting these vehicles through its dealer network.
Where Hummers are built: factory locations
| Model | Years | Manufacturer | Factory Location |
|---|---|---|---|
| H1 | 1992–2006 | AM General | Humvee plant (Indiana) |
| H2 | 2003–2009 | General Motors | Arlington, Texas |
| H3 | 2005–2010 | General Motors | Shreveport, Louisiana |
| Hummer EV | 2024–present | General Motors | Detroit, Michigan (Factory Zero) |
Factory location matters for parts sourcing and resale. Vehicles built at larger, modern facilities like the Arlington plant tend to have fewer defects and more consistent quality than hand-assembled vehicles. The new Hummer EV benefits from GM's latest manufacturing technology and quality control systems.
What ownership means depending on which Hummer you have
If you own an H1, you are dealing with a specialty vehicle. Parts are harder to find, mechanics are fewer, and maintenance costs are higher. Resale value is strong among enthusiasts, but the pool of buyers is small. Insurance may cost more because the vehicle is rare and expensive to repair.
If you own an H2 or H3, you have a GM vehicle with standard service channels. Any GM dealership can service it, parts are available through normal supply chains, and repair costs are predictable. Resale is easier because the market is larger and mechanics are common. Insurance is straightforward.
If you own or are considering a Hummer EV, you are buying a new GM electric vehicle. Service is available at GM dealerships with EV informed. Parts are new and still ramping up in availability. Warranty coverage is strong because the vehicle is new. Resale value is unknown because the model is too recent to have a used market.
How to find the right service for your Hummer
For H1 owners, search for "AM General Hummer service" or "Humvee specialist" in your area. Specialty shops that work on military vehicles or high-end off-road trucks are your best option. Ask the shop directly whether they have worked on H1s and what parts they stock or can source.
For H2 and H3 owners, any GM dealership can service your vehicle. You can also use independent mechanics who work on GM trucks, since the H2 and H3 share platforms and components with Chevy and GMC trucks. Call ahead to confirm they have experience with Hummers, but most GM-trained mechanics will be comfortable with the work.
For Hummer EV owners, service must happen at a GM dealership or a certified EV technician. GM's website lists dealerships with EV service capability. Because the EV is new, call ahead to confirm the dealership has parts in stock and technicians trained on the model.
Frequently Asked Questions
Can I service an H1 at a regular GM dealership?
No. GM dealerships do not stock H1 parts and their mechanics are not trained on AM General's hand-built vehicles. You need a specialist shop that works on military or high-end off-road vehicles. Some larger dealerships may refer you to a specialist or help you source parts, but they cannot do the work themselves.
Are H2 and H3 parts interchangeable?
Some are, but not all. Both are GM vehicles, so engine and transmission parts may overlap with other GM trucks. However, body panels, suspension components, and interior trim are specific to each model. Always confirm part compatibility with a mechanic or parts supplier before ordering.
Where can I buy parts for an older Hummer?
For H1s, try specialty suppliers like Humvee parts shops, military vehicle forums, and salvage yards. For H2 and H3, GM dealerships, RockAuto, Amazon, and eBay all carry parts. Aftermarket suppliers like Dorman and Motorcraft also stock components. Online forums for Hummer owners often recommend trusted suppliers.
Is the Hummer EV covered by GM's warranty?
Yes. The Hummer EV comes with GM's standard new vehicle warranty, which includes a three-year or 36,000-mile basic warranty and an eight-year or 100,000-mile battery warranty. Coverage details are in your owner's manual and on GM's website.
What if I need a part for a Hummer that is no longer in production?
For H1s, salvage yards and specialty suppliers are your main options. For H2s and H3s, GM may still stock parts even though production ended. Call a GM dealership parts department with your vehicle's year and VIN — they can check availability. If GM does not have it, aftermarket suppliers and used parts from online marketplaces are next.